64 51 525 Removing and installing or replacing expansion valve

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WARNING: Risk of injury!
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R 134a refrigerant. See 64 50... Safety instructions for handling refrigerant R134a
Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant oil. See 64 50... Safety instructions for handling refrigerant oil .

IMPORTANT: Risk of damage!
Restart engine only when A/C system has been correctly filled.
Follow instructions for opening and replacing parts in refrigerant circuit!
If A/C system is opened for more than 24 hours, Replace desiccant insert for A/C system

Necessary preliminary tasks:

Remove double pipe
Drawing off, evacuating and filling the A/C system , see 64 50 009 Drawing off, evacuating and filling A/C system (R 134a) .

Remove gasket (1).

Installation:

Observe direction arrows (2) without fail.

If necessary, replace damaged seal (1).

Fig 1: Identifying Seal Location

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and carefully remove expansion valve (2).

Replace sealing rings and moisten with refrigerant oil.

Tightening torque 64 53 2AZ , see 64 53 REFRIGERANT LINES AND EXPANSION VALVE .

Fig 2: Identifying Expansion Valve And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Evacuate and fill A/C system , see 64 50 009 Drawing off, evacuating and filling A/C system (R 134a) .